CN105676305B - A kind of many visual field collection of illustrative plates cooperative detection systems of Shared aperture and method - Google Patents

Abstract

The invention discloses a cooperative detection system of a multi-field of view map with a common aperture. Infrared detector, infrared non-imaging wide spectrum measurement unit, data processing unit, control unit and servo system. Correspondingly, the present invention also proposes a method based on the system. The present invention searches the target area by scanning the large field of view, and then uses the medium field of view to stare at the infrared detection and identify the target, and finally conducts fine detection of the small field of view on the area, combined with spectral data analysis, to identify the target, the detection sensitivity is higher, and the moving target is captured and tracked It is more accurate and stable, and solves the technical problem that it is impossible to study the movement changes of moving targets and dynamic phenomena in conventional remote sensing detection, and the search and tracking of small-scale objects cannot be effective, so it has high implementability and practical promotion value.

Description

A system and method for collaborative detection of a common-aperture multi-field-of-view map

technical field

The invention belongs to the interdisciplinary fields of remote sensing measurement and control, spectral analysis and image recognition, and more specifically relates to a system and method for collaborative detection of a common-aperture multi-field of view spectrum.

Background technique

Remote sensing detection is the cutting-edge science and technology field to realize my country's scientific and technological power. Due to the single field of view of the traditional infrared fixed-focus system, it cannot realize search and tracking at the same time; and the intelligent multi-spatial resolution sensor can intelligently adjust the focal length according to the needs of the detector. Continuously changing to change the size of the field of view, the image plane is stable and maintains good image quality, and it is not easy to lose targets (such as underwater vehicles), so it has the functions of large-scale search with large field of view and small-scale tracking with small field of view. In addition, according to different use environments and observation objectives, the appropriate focal length can be selected to achieve the best observation effect, which has certain practical significance.

However, for the application scenarios of multi-field target detection, the existing remote sensing detection technology has the following defects: (1) Conventional remote sensing detection methods cannot take into account low/medium/high resolution, and track and detect the motion changes of moving targets and dynamic phenomena for research ; (2) The existing remote sensing detection technology is not effective for small-scale objects, and cannot realize search and tracking at the same time, lacking relevant theoretical methods and technical means; correspondingly, it is urgent to find a method suitable for multi-field objects Systems and methods for probing application environments.

Contents of the invention

Aiming at the above defects or deficiencies of the prior art, the present invention provides a system and method for collaborative detection of a common-aperture multi-field of view map, through the use of large-scale scanning search of large field of view, infrared staring recognition of medium field of view and small-scale tracking and recognition of small field of view The method makes the detection sensitivity higher, making the capture, tracking and identification of moving targets more accurate and stable, so it is especially suitable for applications in multi-field of view moving target detection environments.

In order to achieve the above object, according to one aspect of the present invention, a co-aperture multi-field map cooperative detection system is proposed, which is characterized in that the system includes an infrared optical window, a large field of view two-dimensional scanning mirror, a co-aperture multi- Field of view main optical system, large field of view scanning detector, staring infrared detector, infrared non-imaging wide spectrum measurement unit, data processing unit, control unit and servo system, of which:

The large field of view two-dimensional scanning mirror is controlled by a servo system to rotate and adjust its orientation to align with the target area, so as to reflect the light in the target area to the main optical system with common aperture and multi-field of view;

The common-aperture multi-field main optical system is used to focus the large field of view scanning infrared light to the large field of view scanning detector, to focus the staring infrared light to the staring infrared detector; at the same time, to focus the remaining light to the infrared non-imaging wide The spectrum measurement unit performs spectrum measurement;

The large field of view scanning detector is used to perform large field of view infrared imaging on the target area, and the infrared image is sent to the data processing unit after A/D conversion;

The staring infrared detector is used to perform staring infrared imaging on the target area, and the infrared image is sent to the data processing unit after A/D conversion;

The infrared non-imaging wide spectrum measurement unit is used to perform spectrum measurement and analysis on the target, and then transmit the infrared spectrum data of the target to the data processing unit;

The data processing unit is used to perform fusion processing on the target large field of view scanning infrared image data, staring infrared image data, and infrared wide spectrum data;

The control unit is used to control the large field of view two-dimensional scanning mirror to track the movement of moving objects and dynamic phenomena through a servo system according to the data processing results fused by the data processing unit.

As further preferred, the common-aperture multi-field primary optical system includes a Carl's mirror group, a wide-spectrum relay mirror, a first lens group, a second lens group, a third lens group, a fourth lens group, a Five lens groups, a first beam splitter and a second beam splitter.

As a further preference, the Karl Fischer mirror group is used to reflect the light reflected by the large field of view two-dimensional scanning mirror to the wide-spectrum relay mirror; the wide-spectrum relay mirror is used to focus the light to the first A lens group; the first beam splitter is used to partially transmit the light from the first lens group to the second lens group, and focus it to the focal plane of a large field of view by the second lens group, and reflect the remaining light to the third lens group; The second beam splitter is used to transmit part of the light from the third lens group to the fourth lens group, and the fourth lens group is focused to the focal plane of the middle field of view, and the remaining light is reflected to the fifth lens group, and the fifth lens group The lens group focuses to the focal plane of the small field of view.

As a further preference, the Cassegrain system is used for the Cassegrain reflector group, which is composed of a parabolic reflector and a hyperboloid reflector to realize infrared spectrum imaging and energy convergence of the target area. The parabolic reflector and the The shading ratio of the hyperboloid reflector is not greater than 1:3.

As a further preference, the first lens group is a lens group with a large field of view; the third lens group is a lens group with a medium field of view; the fifth lens group is a lens group with a small field of view; the second lens group and the The fourth lens group is a wide-spectrum lens group, which is used for compensating and correcting the spot quality of infrared wide-spectrum energy convergence.

As further preferably, the integrated focal length of the first lens group, the first beam splitter and the second lens group is f1; the integrated focal length of the first lens group, the third lens group, the second beam splitter and the fourth lens group is f2= af1, a>1; the combined focal length of the first lens group, the first beam splitter, the third lens group, the second beam splitter and the fifth lens group is f3=bf2, b>a.

As a further priority, the first spectroscope is divided into two areas: a small area in the middle and a large area around it; the small area in the middle fully reflects the imaging band required for the medium field of view and the spectral band required for the small field of view, so Describes the imaging band of large-area full-penetration and large field of view.

As a further preference, the second spectroscope is divided into two regions: a small central region and a large region around it; The imaging band required by the field.

As a further preference, an optical coupling is used between the fifth lens group and the infrared non-imaging wide-spectrum spectrometry unit.

According to another aspect of the present invention, a kind of detection method based on the described co-aperture multi-field of view map collaborative detection system is proposed, it is characterized in that, described method comprises:

(1) Large field of view two-dimensional scanning mirror search field of view;

(2) For the target area, collect a large field of view infrared image to detect whether there is a suspected target;

(3) If a suspected target is detected, use the medium field of view to stare at the target area to obtain the infrared image of the target area; if no suspected target is detected, continue to search for the target area with a large field of view;

(4) For the suspected target, use a small field of view to aim and collect target infrared spectrum data;

(5) Fusion of infrared images and spectral information of multiple fields of view and different resolutions of the target;

(6) Identify the target and output the target type.

Generally speaking, compared with the prior art, the above technical solution according to the present invention mainly has the following technical advantages:

1. The system and corresponding method for the collaborative detection of the common-aperture multi-field of view spectrum proposed by the present invention can distinguish different objects or substances through the spectral characteristics of the substance, coupled with the infrared image information of the multi-spatial resolution of the object, so that the remote sensing detection Stronger ability to recognize objects;

2. In addition, the present invention scans the target area through a large field of view, and then uses the middle field of view to stare at the infrared detection to identify the target, and finally conducts a small field of view fine detection on the area, combined with spectral data analysis, to identify the target, and the detection sensitivity is higher. Identify targets more accurately;

Description of drawings

Fig. 1 is a schematic diagram of the present invention's common-aperture multi-field map collaborative detection system;

Fig. 2 is the layout diagram of the common-aperture main optical system of the present invention;

Fig. 3 is a schematic diagram of the collaborative detection method of the common-aperture multi-field map of the present invention;

Fig. 4 is an example diagram of cooperative detection of common-aperture multi-field of view spectrum in the present invention;

Fig. 5 is a flow chart of the collaborative detection method of the common-aperture multi-field of view map of the present invention;

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The present invention provides a common-aperture multi-field-of-view map collaborative detection system, which simultaneously integrates multi-spatial resolution imaging and small-field high-resolution spectrum measurement functions. As shown in Figure 1, the detection system includes an infrared optical window, a common Multi-aperture main optical system, large field of view scanning detector, staring infrared detector, infrared non-imaging wide spectrum measurement unit, data processing unit, control unit and servo system; large field of view two-dimensional scanning rotating mirror through the servo system Control the rotation and adjust the azimuth to align with the target area, which is used to reflect the light in the target area to the main optical system of the common-aperture multi-field of view; the main optical system of the common-aperture multi-field of view focuses the large-field scanning infrared light to the large-field scanning detector ;focus the staring infrared light to the staring infrared detector; at the same time, focus the remaining light to the infrared wide spectrum measurement unit for spectrum measurement; the large field of view scanning detector performs large field of view infrared imaging on the target area, and the infrared image enters the A/D After conversion, it is sent to the data processing unit; the staring infrared detector performs staring infrared imaging on the target area, and the infrared image is A/D converted and then sent to the data processing unit; the infrared non-imaging wide-spectrum measurement unit measures the target Analyze, and then transmit the infrared spectrum data of the target to the data processing unit; the data processing unit performs fusion processing on the target large-field scanning infrared image data, staring infrared image data, and infrared wide-spectrum data; the control unit processes the fusion data according to the data processing unit As a result, the motion of moving objects and dynamic phenomena is tracked by the scanning mirror controlled by the servo system.

Further, the common-aperture multi-field primary optical system includes a Carl's mirror group, a wide-spectrum relay mirror, a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group, the first beam splitter and the second beam splitter;

Further, the Karl Fischer mirror group reflects the light reflected by the large field of view two-dimensional scanning mirror to the wide-spectrum relay mirror; the wide-spectrum relay mirror focuses the light to the first lens group; the first beam splitter will Part of the light from the first lens group is transmitted to the second lens group, and is focused by the second lens group to the focal plane of a large field of view, and the remaining light is reflected to the third lens group; the second beam splitter splits the light from the third lens group Part of it is transmitted to the fourth lens group, and is focused to the focal plane of the medium field of view by the fourth lens group; the remaining light is reflected to the fifth lens group, and is focused to the focal plane of the small field of view by the fifth lens group;

Further, the Cassegrain system is adopted for the Karl’s reflector group, which is composed of a parabolic reflector and a hyperboloid reflector to realize infrared spectrum imaging and energy convergence of the target area. The parabolic reflector and the hyperboloid reflector The mirror blocking ratio is not greater than 1:3.

In an implementation example of the present invention, as shown in FIG. 3, the first field of view lens group is a large field of view lens group, and the spatial resolution is relatively low; the third lens group is a medium field of view lens group, and the spatial resolution is relatively low. High; the fifth lens group is a small field of view lens group with the highest spatial resolution; the second and fourth lens groups are wide-spectrum lens groups, which are used to realize the compensation and correction of the converged spot quality of infrared wide-spectrum energy;

Further, an optical coupling is adopted between the fifth lens group and the infrared non-imaging wide-spectrum spectrometry unit;

Further, the integrated focal length of the first lens group, the first beam splitter and the second lens group is f1; the integrated focal length of the first lens group, the third lens group, the second beam splitter and the fourth lens group is f2=af1, a>1; the combined focal length of the first lens group, the first beam splitter, the third lens group, the second beam splitter and the fifth lens group is f3=bf2, b>a;

Further, the first beam splitter is divided into two areas: a small area in the middle and a large area around it. Among them, the small area in the middle is fully reflected in the imaging band required by the medium field of view and the spectral band required by the small field of view, and the imaging band required by the large area and the large field of view.

Further, the second beam splitter is divided into two areas: a small area in the middle and a large area around it. Among them, the spectral band required by the total reflection and small field of view in the small area in the middle, and the imaging band required by the full-transmission medium field of view in the large area.

Further, the readout circuit chip of the large field of view scanning detector and the staring infrared detector is integrated with an AD conversion function, so that the infrared focal plane array detector directly outputs digital signals.

As shown in Figure 4, it is an example diagram of detecting an actual target by using the common-aperture multi-field of view atlas cooperative detection system of the present invention;

Further, as shown in Figure 5, the present invention provides a flow chart of a detection method based on a common-aperture multi-field-of-view map cooperative detection system, and the specific steps are as follows:

(7) Large field of view two-dimensional scanning mirror search field of view;

(8) For the target area, collect a large field of view infrared image to detect whether there is a suspected target;

(9) If a suspected target is detected, use the medium field of view to stare at the target area to obtain the infrared image of the target area; if no suspected target is detected, continue to search for the target area with a large field of view;

(10) For suspected targets, use a small field of view to aim and collect target infrared spectral data;

(11) Fusion of infrared images and spectral information of multiple fields of view and different resolutions of the target;

(12) Identify the target and output the target type.

Further, the implementation of the detection method of the present invention is illustrated by the common-aperture multi-field of view cooperative detection system in Fig. 1 as an example, specifically: the main optical system of the common-aperture multi-field of view in Fig. Composed of the secondary mirror, the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, the first beam splitter and the second beam splitter; the target incident light is reflected by two-dimensional scanning with a large field of view The mirror is reflected to the common aperture multi-field main optical system, and the common aperture main optical system focuses the large field of view scanning infrared light to the large field of view scanning detector; focuses the staring infrared light to the staring infrared detector; at the same time focuses the remaining light to the The infrared wide-spectrum measurement unit performs spectrum measurement; the large-field scanning detector performs large-field infrared imaging on the target area, and the infrared image is A/D converted and sent to the data processing unit; the staring infrared detector stares at the target area Infrared imaging, after the infrared image is A/D converted, it is sent to the data processing unit; the infrared non-imaging wide-spectrum spectrum measurement unit performs spectrum measurement and analysis on the target, and then transmits the infrared spectrum data of the target to the data processing unit; the data processing unit Carry out fusion processing on target large-field scanning infrared image data, staring infrared image data, and infrared wide-spectrum data; the control unit controls the scanning mirror to track the movement of moving targets and dynamic phenomena through the servo system based on the fusion data processing results of the data processing unit.

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (10)

1. A common-aperture multi-field of view map collaborative detection system, characterized in that the system includes an infrared optical window, a large field of view two-dimensional scanning mirror, a common-aperture multi-field of view main optical system, and a large field of view scanning detector , staring infrared detector, infrared non-imaging wide spectrum measurement unit, data processing unit, control unit and servo system, wherein: The large field of view two-dimensional scanning mirror is controlled by a servo system to rotate and adjust its orientation to align with the target area, so as to reflect the light in the target area to the main optical system with common aperture and multi-field of view; The common-aperture multi-field main optical system is used to focus the large field of view scanning infrared light to the large field of view scanning detector, to focus the staring infrared light to the staring infrared detector; at the same time, to focus the remaining light to the infrared non-imaging wide The spectrum measurement unit performs spectrum measurement; The large field of view scanning detector is used to perform large field of view infrared imaging on the target area, and the infrared image is sent to the data processing unit after A/D conversion; The staring infrared detector is used to perform staring infrared imaging on the target area, and the infrared image is sent to the data processing unit after A/D conversion; The infrared non-imaging wide spectrum measurement unit is used to perform spectrum measurement and analysis on the target, and then transmit the infrared spectrum data of the target to the data processing unit; The data processing unit is used to perform fusion processing on the target large field of view scanning infrared image data, staring infrared image data, and infrared wide spectrum data; The control unit is used to control the large field of view two-dimensional scanning mirror to track the movement of moving objects and dynamic phenomena through a servo system according to the data processing results fused by the data processing unit. 2. The co-aperture multi-field of view map cooperative detection system as claimed in claim 1, wherein the co-aperture multi-field main optical system includes a Karl Fischer mirror group, a wide-spectrum relay mirror, and a first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, the first beam splitter and the second beam splitter. 3. The co-aperture multi-view field map collaborative detection system according to claim 2, wherein the Karl Fischer mirror group is used to reflect the light reflected by the large field of view two-dimensional scanning rotating mirror into a wide spectrum The relay mirror; the wide-spectrum relay mirror is used to focus the light to the first lens group; the first beam splitter is used to partially transmit the light from the first lens group to the second lens group, and the light is transmitted by the second lens The group is focused to the focal plane of a large field of view, and the remaining light is reflected to the third lens group; the second beam splitter is used to transmit part of the light from the third lens group to the fourth lens group, and the fourth lens group is focused to The focal plane of the medium field of view, the remaining light is reflected to the fifth lens group, and is focused to the focal plane of the small field of view by the fifth lens group. 4. The co-aperture multi-field of view map collaborative detection system as claimed in claim 2 or 3, wherein said Karl's reflector group adopts a Cassegrain system to realize infrared spectral imaging and energy convergence of the target area, It consists of a parabolic reflector and a hyperboloid reflector, and the shading ratio of the parabolic reflector and the hyperboloid reflector is not greater than 1:3. 5. The co-aperture multi-view field map cooperative detection system as claimed in claim 4, wherein the first lens group is a large field of view lens group; the third lens group is a middle field of view lens group; The fifth lens group is a small field of view lens group; the second lens group and the fourth lens group are wide-spectrum lens groups, which are used to compensate and correct the spot quality of infrared wide-spectrum energy convergence. 6. The co-aperture multi-field of view map cooperative detection system as claimed in claim 2 or 3, wherein the integrated focal length of the first lens group, the first beam splitter and the second lens group is f1; the first lens group , The combined focal length of the third lens group, the second beam splitter and the fourth lens group is f2=af1, a>1; the first lens group, the first beam splitter, the third lens group, the second beam splitter and the fifth lens group The comprehensive focal length is f3=bf2, b>a. 7. The co-aperture multi-field of view cooperative detection system as claimed in claim 2 or 3, wherein the first spectroscope is divided into two areas: a small area in the middle and a large area around it; The small area totally reflects the imaging waveband required by the medium field of view and the spectral waveband required by the small field of view, and the large area fully transmits the imaging waveband of the large field of view. 8. The co-aperture multi-field of view spectrum cooperative detection system as claimed in claim 2 or 3, wherein the second spectroscope is divided into two areas: a small area in the middle and a large area around it; The small area totally reflects the spectral band required for the small field of view, and the large area fully transmits the required imaging band for the medium field of view. 9. The co-aperture multi-field-of-view spectrum cooperative detection system according to claim 2 or 3, wherein optical coupling is used between the fifth lens group and the infrared non-imaging wide-spectrum spectrometry unit. 10. A detection method based on the co-aperture multi-field of view map cooperative detection system according to any one of claims 1-9, characterized in that the method comprises: (1) Large field of view two-dimensional scanning mirror search field of view; (2) For the target area, collect a large field of view infrared image to detect whether there is a suspected target; (3) If a suspected target is detected, use the medium field of view to stare at the target area to obtain the infrared image of the target area; if no suspected target is detected, continue to search for the target area with a large field of view; (4) For the suspected target, use a small field of view to aim and collect target infrared spectrum data; (5) Fusion of infrared images and spectral information of multiple fields of view and different resolutions of the target; (6) Identify the target and output the target type.